5.1. - Metal water piping
5.2. - Glass-reinforced plastic (fibre glass) water piping
5.3. - Plastic water piping
5.5. - Plastic pipes and shaped pieces for potable water distribution lines
5.6. - Closing and non-return valves
5.7. - Relief, control and pressure-reducing valves
5.8. - Slide valves
5.9. - Dampers
5.10. - Hydrants
5.11. - Other pipes for water management sector
6.1. - Earthenware ducts
6.3. - Glass-reinforced plastic (fibre glass) conduits
6.6. - Pre-cast sewage conduit manholes
6.7. - Fittings for sewage conduits
6.8. - Covers
8.1. - Water and flow meters for cold water